F16H 61/4131
Fluid exchange by aspiration from reservoirs
Official title: Fluid exchange by aspiration from reservoirs, e.g. sump
F16H61/4131 (Fluid exchange by aspiration from reservoirs) appears on 27 US grants and 16 published applications in this corpus.
Search patents in F16H- Granted patents
- 27
- Published applications
- 16
- Assignees
- 14
- Inventors
- 38
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 1 |
| 2003 | 3 | 2 |
| 2004 | 1 | 3 |
| 2005 | 2 | 1 |
| 2006 | 2 | 1 |
| 2007 | 0 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 2 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method of controlling hydraulic device25 Nov 2025US 12,480,282 B2Nabtesco Corporation
- Pressure relief valve assembly, modular pressure relief valve assembly, and hydraulic control assembly having such a pressure relief valve assembly3 Jun 2025US 12,320,437 B2Robert Bosch GmbH
- Hydraulic transaxle24 May 2022US 11,338,671 B2Kanzaki Kokyukoki Mfg.Co., Ltd.
- Method and system for evaluating hydrostatic transmission using charge pressure15 Mar 2022US 11,274,746 B1Deere & Company
- Hydraulic circuit including a hydraulic machine drain provided with a flow-control means and fluid-treatment functions26 Feb 2019US 10,215,275 B2Technoboost
- Method of controlling hydraulic device20 Jun 2024US 2024/0200306 A1Nabtesco Corporation
- Pressure Relief Valve Assembly, Modular Pressure Relief Valve Assembly, and Hydraulic Control Assembly Having Such a Pressure Relief Valve Assembly4 Apr 2024US 2024/0110633 A1Robert Bosch GmbH
- Hydraulic transaxle3 Dec 2020US 2020/0376957 A1Kanzaki Kokyukoki Mfg.Co., Ltd.
- Hydraulic circuit including a hydraulic machine drain provided with a flow-control means and fluid-treatment functions16 Nov 2017US 2017/0328469 A1Technoboost
- Hydraulic circuit comprising a very-low-presure reservoir placed under negative pressure9 Nov 2017US 2017/0321727 A1Technoboost
Most cited
By later US patents
- Combination valve including improved neutral valve for use in hydrostatic transmission75US 5,546,752 AHydro-Gear Limited Partnership · 1996
- Hydrostatic transmission with hydraulic bypass and air bleed47US 5,010,733 ASauer-Sundstrand Company · 1991
- Electro-mechanical bypass for hydrostatic transmission28US 6,145,312 AHydro-Gear Limited Partnership · 2000
- Hydrostatic transmission26US 6,508,059 B1Kanzaki Kokyukoki Mfg.Co., Ltd. · 2003
- Hydraulic transmission for motor vehicle23US 5,094,078 AHonda Giken Kogyo Kabushiki Kaisha · 1992